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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 5: ELECTRIC TRACTION-SPEED TIME CURVES AND MECHANICS OF TRAIN MOVEMENT
+
+// EXAMPLE : 5.7 :
+// Page number 782
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+W = 203.0      // Weight of motor-coach train(tonne)
+no = 4.0       // Number of motors
+T = 5130.0     // Shaft torque(N-m)
+V_m = 42.0     // Maximum speed(kmph)
+G = 100.0/250  // Gradient
+gamma = 3.5    // Gear ratio
+n = 0.93       // Gear efficiency
+D = 91.5/100   // Wheel diameter(m)
+r = 45.0       // Train resistance(N/tonne)
+I = 10.0       // Rotational inertia(%)
+
+// Calculations
+W_e = W*(100+I)/100                     // Accelerating weight of train(tonne)
+F_t = n*4*T*2*gamma/D                   // Tractive effort(N)
+alpha = (F_t-W*r-98.1*W*G)/(277.8*W_e)  // Acceleration(km phps)
+t_1 = V_m/alpha                         // Time taken by train to attain speed(sec)
+
+// Results
+disp("PART IV - EXAMPLE : 5.7 : SOLUTION :-")
+printf("\nTime taken by train to attain speed, t_1 = %.1f sec", t_1)